fabs/rotate-me-fast
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Author SHA1 Message Date
Fabien Freling
da4bdf7702 Decompose complex lines. 
Create a bunch of const variables to better profile.
 2014-07-27 22:41:09 +02:00
Fabien Freling
4dba86c9f0 Add configure script. 
- Deactivate LTO.
- Deactivate SIMD.
 2014-07-27 18:01:41 +02:00
Fabien Freling
f8178fae98 Add 'callgrind' target. 
- Reactivate SIMD.
 2014-07-24 22:40:02 +02:00
Fabien Freling
c704c14526 Add 'runall' target. 
The ‘runall’ target runs the rotation on different sizes:
- 512x512
- 1024x1024
- 3000x3000
 2014-07-24 22:17:55 +02:00
Fabien Freling
760d6244d0 Have different quantifications. 
I now have a precise quantification for point position and a more
approximate one for pixel interpolation.
 2014-07-24 22:13:47 +02:00
Fabien Freling
80b004a418 Change Point type to int64_t. 2014-07-24 22:11:31 +02:00
Fabien Freling
e804d9b5ca Add TPoint operators +=, -=, *=, /= 2014-07-24 00:40:27 +02:00
Fabien Freling
e7802e30fd Compute src position in quantified coordinates. 
Instead of relying on floating values for the position in the
source image, we quantify all positions with a power of 2.

We lose some precision and the delta step is less accurate, leading in
some offset at the end.

For now the rotation is not correct.
 2014-07-23 23:44:14 +02:00
Fabien Freling
9cdea5bcc3 Add lena_64.pgm (useful for debugging). 2014-07-23 23:40:29 +02:00
Fabien Freling
7e152c29fc Add support for PGM format. 
The code has been split into different source files.

This breaks for now rotation for tiled images and PPM format. The focus
is now on the PGM format.
 2014-07-21 06:57:08 +02:00
Fabien Freling
53974a4116 Add PGM images of Lena of various sizes. 2014-07-20 13:14:51 +02:00
Fabien Freling
20055e22c5 Clean Makefile indentation. 2014-07-16 22:07:30 +02:00
Fabien Freling
c918ca5504 Remove out-of-bounds check for tiled images. 
Since tiles have an overlap, if the absolute point is inside the source
image, we can interpolate.
 2014-07-16 21:50:25 +02:00
Fabien Freling
5f78958584 Use PIXEL_SIZE to move to next pixel in I/O. 2014-07-16 20:52:52 +02:00
Fabien Freling
afd89f5238 Remove PackedPixel. 
The RGBX format takes more space but it is more efficient to handle.
 2014-07-16 20:47:43 +02:00
Fabien Freling
a992cba5ed Implement RGBX for tiled images. 
Interpolation is now done with SIMD with -DSIMD for tiled images as
well.
 2014-07-16 20:44:32 +02:00
Fabien Freling
bcf16680ae Remove RGBX structure. 
The pixels are still packed as RGBX in memory but
no structure is created, it’s just a contiguous buffer.

Interpolation is now done with SIMD on integer values.

- Add SIMD define.
 2014-07-16 02:08:32 +02:00
Fabien Freling
cce4d45ba6 Implement pixels as RGBX structure. 
- Add ‘make debug’ target
- Add links in README
 2014-07-12 22:42:48 +02:00
Fabien Freling
8175b8a06c Do not save output images. 2014-07-10 22:01:55 +02:00
Fabien Freling
7c6cfd9046 Create small overlap in tiles. 
Tiles overlap on the bottom line and the right column.
Having an overlap allows us to get neighbor points for each point in a
tile, regardless of its position.
 2014-07-10 22:01:55 +02:00
Fabien Freling
fea3e90fba Remove unused code. 2014-07-09 08:19:09 +02:00
Fabien Freling
3ab9df90df Remove temp buffer for non-tiled image. 2014-07-09 08:00:58 +02:00
Fabien Freling
eb5bae42c3 Allocate tiles as a unified buffer. 2014-07-09 07:50:09 +02:00
Fabien Freling
edb9ef7dd8 Remove temp tile. 2014-07-08 08:48:17 +02:00
Fabien Freling
9a9db2d4fd Interpolate on quantized values for tiled images. 2014-07-08 08:04:43 +02:00
Fabien Freling
bb996596e4 Add commodity targets. 
- make run
- make cachegrind
 2014-07-08 00:15:16 +02:00
Fabien Freling
54e35ff8d0 Tweak stats display. 
Add average metric.
 2014-07-07 23:36:10 +02:00
Fabien Freling
68fb1b1951 Do interpolation on quantized values. 2014-07-07 23:19:57 +02:00
Fabien Freling
0929a51dea Remove some sample images. 2014-07-07 19:50:20 +02:00
Fabien Freling
45ee6c55ad Add README. 2014-07-07 19:50:20 +02:00
Fabien Freling
67b4bcc3d3 Minimize computation in rotate_pixel(). 
- Deactivate tests.
- Check if delta is on integer values.
 2014-07-06 23:49:46 +02:00
Fabien Freling
a6ef15ea62 Create PackedPixel structure. 2014-07-06 23:47:21 +02:00
Fabien Freling
049228b377 Fill a temp buffer for each line. 
We don’t write into the memory right away, we first write to a temp
buffer that we blit into the rotated image.
 2014-07-04 08:23:06 +02:00
Fabien Freling
e3e0d3c20a Fix first rotated tile on each row. 
The first tile on each row seemed to be missing values.
This was due to the ‘continue’ statement that would prevent
src_rotated_point to be incremented properly.
 2014-07-04 00:34:06 +02:00
Fabien Freling
7f29bd192a Pass tile to rotate_pixel() instead of image. 2014-07-04 00:23:54 +02:00
Fabien Freling
80975f6138 Update TODO. 2014-07-04 00:23:21 +02:00
Fabien Freling
8811d7023e Factorize rotated point computation 2014-07-03 23:56:10 +02:00
Fabien Freling
a871d92723 Add image destructors. 2014-07-03 23:56:10 +02:00
Fabien Freling
9e8d79d384 Return image pointer for rotate(). 2014-07-03 23:56:10 +02:00
Fabien Freling
8d096ee2ce Add get_save_path(). 2014-07-03 23:49:10 +02:00
Fabien Freling
4f124a2896 Remove deprecated functions (draw). 2014-07-03 23:48:11 +02:00
Fabien Freling
e86dbe0f36 Factorize the computation of the source point. 2014-07-02 22:38:57 +02:00
Fabien Freling
7e33e85909 Fix tiled rotation. 
- Add TiledImage::access_pixel().
- Add TiledImage::print_tile().
- Compare implementations.
 2014-07-02 21:54:52 +02:00
Fabien Freling
007ad2284e Add basic tiled image type. 2014-07-01 21:52:40 +02:00
Fabien Freling
3af56f6619 Interpolate using SSE instructions. 2014-06-29 17:17:19 +02:00
Fabien Freling
05777d59f8 Deduce src points needed for interpolation. 
Computing the four points is too heavy.
 2014-06-28 18:35:48 +02:00
Fabien Freling
36c47fd13e Add Lena 64x64 PPM. 2014-06-28 18:24:10 +02:00
Fabien Freling
0a0fbabeac Bilinear interpolation. 
- Compute src delta for each rotated steps.
 2014-06-28 18:23:43 +02:00
Fabien Freling
258ddce814 Use a unique buffer for pixels (scanline). 
- Add rotate_pixel().
- Remove APoint, use Point instead.
 2014-06-28 13:52:24 +02:00
Fabien Freling
6a94c79ac2 FIll new interpolated pixels. 
- Take input image in argument.
- Allow set_pixel() out of bounds, noop.
 2014-06-26 23:45:02 +02:00